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Collection Views with UIKit
Swift 5.6 | iOS 15
With this guide, you will learn how to configure and display items in a grid with Collection Views. After reading this guide, you will know how to work with Collection Views, how to define and configure custom cells, and how to create modern lists.
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Description
Quick Guides for Masterminds are excerpts from our best-selling books SwiftUI for Masterminds, UIKit for Masterminds, and HTML5 for Masterminds, providing a cost-effective alternative to getting the information you need.

With this guide, you will learn how to configure and display items in a grid with Collection Views. After reading this guide, you will know how to work with Collection Views, how to define and configure custom cells, and how to create modern lists.
Table of Contents
COLLECTION VIEWS
Collection Views
Collection View Cells
Collection View Delegate
Data Source
Implementing Collection Views
Flow Layout
Custom Layout
Supplementary Views
Sections
Lists
Examples
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Listing 1: Creating a Collection View cell
Listing 2: Defining a model for a diffable data source
Listing 3: Configuring a Collection View
Listing 4: Configuring the background of a Collection View cell
Listing 5: Configuring Flow layout
Listing 6: Declaring a specific size for each cell
Listing 7: Assigning a compositional layout to the Collection View
Listing 8: Customizing a compositional layout
Listing 9: Defining a reusable view
Listing 10: Defining the supplementary views
Listing 11: Adding supplementary views to a compositional layout
Listing 12: Storing the data in sections
Listing 13: Working with multiple sections
Listing 14: Snapshot for multiple sections
Listing 15: Defining a model to test section snapshots
Listing 16: Moving items between section snapshots
Listing 17: Creating a Collection View List
Listing 18: Defining the header for a list
Listing 19: Adding supplementary views to the list
Listing 20: Configuring cell's separators
Listing 21: Adding accessories to the cells
Listing 22: Selecting and deselecting a cell in a list
Listing 23: Defining the buttons for swipe gestures
Listing 24: Defining a model for a hierarchical list
Listing 25: Creating a hierarchical list
Links
UICollectionView
https://developer.apple.com/reference/uikit/uicollectionview
UICollectionViewDiffableDataSource
https://developer.apple.com/documentation/uikit/uicollectionviewdiffabledatasource
UICollectionViewFlowLayout
https://developer.apple.com/reference/uikit/uicollectionviewflowlayout
UICollectionViewDelegate
https://developer.apple.com/reference/uikit/uicollectionviewdelegate
UICollectionViewDataSource
https://developer.apple.com/reference/uikit/uicollectionviewdatasource
UICollectionReusableView
https://developer.apple.com/reference/uikit/uicollectionreusableview
UICollectionViewLayout
https://developer.apple.com/reference/uikit/uicollectionviewlayout
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